packaging: build: fix 2nd time installation

remove files symlink before creating new.

Related-To: https://bugzilla.redhat.com/show_bug.cgi?id=997418
Change-Id: I5c78b4de6fc50d5445f6aff854cb01df8bddc41d
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>